Yes I knew that.
I keep a old cell phone and it's 12 volt charger in the car for that reason. I never thought about someone stealing the old phone, it will be no use to them, except to make a 911 call.
The older phones might not have GPS tracking to the phone location, while Congress has decided that we must have GPS tracking on the new phones - so we can be located in case of a 911 call.
Might be something to keep in the trunk of a car - in case you get kidnapped or car jacked. They can track a phone that is turned on and charged by GPS.
Now thiefs know that the Onstar tracked GMC vehicles are not the ones to get caught stealing them. . . .
Fred.